If you need a slightly larger internal work space than the TC-5915A shield box, then this might be your choice. This shield box provides RF shield and signal connections necessary for testing mobile wireless devices, such as mobile cell phones or WLAN devices. The TC-5916A RF Shield box has two RF ports and two EMI filtered data ports. With the RF coupling accessory and filtered control ports, the TC-5916A RF Shield Box makes an ideal solution for RF testing mobiles and small RF devices on test benches for R&D, Service, and QA. This RF Shield box is ideal when you need the flexibility of a little extra room for the device being tested.